please answer this problem

Problem 2 Battle, who works in her brother's hardware store, is in charge of purchasing. Lila has determined that the annual demand for #6 screws is 100,000 and is fairly constant over the 200 days that the store is open each year. She estimates that it costs $10 every time an order is placed. This cost includes her wages, the cost of the forms used in placing the order, and so on. Furthermore, she estimates that the cost of carrying one screw in inventory for a year is 0.5 cents. 1. How many \#6 screws should Lila order at a time to minimize the cost? 2. How many orders she will place in one year 3. After how many day she will make re-orders 4. What is the total cost of inventory (not including the purchase cost) 5. It takes 8 working days for an order of \#6 screws to arrive once the order has been placed. What should be the re-order point (ROP)